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<?php namespace CheckEmail;
class Check_Email_Log_Autoloader {
protected $prefixes = array();
protected $files = array();
public function register() {
spl_autoload_register( array( $this, 'load_class' ) );
// file exists check is already done in `add_file`.
foreach ( $this->files as $file ) {
$this->require_file( $file );
}
}
public function add_namespace( $prefix, $base_dir, $prepend = false ) {
// normalize namespace prefix
$prefix = trim( $prefix, '\\' ) . '\\';
// normalize the base directory with a trailing separator
$base_dir = rtrim( $base_dir, DIRECTORY_SEPARATOR ) . '/';
// initialize the namespace prefix array
if ( false === isset( $this->prefixes[ $prefix ] ) ) {
$this->prefixes[ $prefix ] = array();
}
// retain the base directory for the namespace prefix
if ( $prepend ) {
array_unshift( $this->prefixes[ $prefix ], $base_dir );
} else {
array_push( $this->prefixes[ $prefix ], $base_dir );
}
}
public function add_file( $filename ) {
if ( ! in_array( $filename, $this->files, true ) ) {
$this->files[] = $filename;
}
}
public function load_class( $class ) {
// the current namespace prefix
$prefix = $class;
// work backwards through the namespace names of the fully-qualified
// class name to find a mapped file name
while ( false !== $pos = strrpos( $prefix, '\\' ) ) {
// retain the trailing namespace separator in the prefix
$prefix = substr( $class, 0, $pos + 1 );
// the rest is the relative class name
$relative_class = substr( $class, $pos + 1 );
// try to load a mapped file for the prefix and relative class
$mapped_file = $this->load_mapped_file( $prefix, $relative_class );
if ( $mapped_file !== false ) {
return $mapped_file;
}
// remove the trailing namespace separator for the next iteration
// of strrpos()
$prefix = rtrim( $prefix, '\\' );
}
// never found a mapped file
return false;
}
protected function load_mapped_file( $prefix, $relative_class ) {
// are there any base directories for this namespace prefix?
if ( false === isset( $this->prefixes[ $prefix ] ) ) {
return false;
}
// look through base directories for this namespace prefix
foreach ( $this->prefixes[ $prefix ] as $base_dir ) {
// replace the namespace prefix with the base directory,
// replace namespace separators with directory separators
// in the relative class name, append with .php
$file = $base_dir
. str_replace( '\\', '/', $relative_class )
. '.php';
// if the mapped file exists, require it
if ( $this->require_file( $file ) ) {
// yes, we're done
return $file;
}
}
// never found it
return false;
}
protected function require_file( $file ) {
if ( file_exists( $file ) ) {
require_once $file;
return true;
}
return false;
}
}